Update to use curl to fetch the initial script

Author: ndmitchell

.travis.yml

@@ -9,4 +9,4 @@ env:
 - GHCVER=head
 
 script:
-- wget https://raw.github.com/ndmitchell/neil/master/travis.sh -O - --quiet | sh
+- curl -sL https://raw.github.com/ndmitchell/neil/master/travis.sh | sh